940 PCS/Set M2/M3/M4/M5 Flat Head Hexagon Socket Screws Gasket Ring Set

1. Material: stainless steel
2. Strength grade: Class 6.8
3. Thicknesses of 2mm, 3mm, 4mm and 5mm respectively, suitable for most applications
4. Dimensions: 19.5x13x3.6cm
5. weight: 618g